﻿using System;
using System.Collections.Generic;
using System.Web;


namespace CCPSIP.Message
{
    /// <summary>CCPSIP_012：讀取對話的未讀訊息 API</summary>
    /// idHeader = 裝置 UUID 前八碼。iOS 請使用 [CCPCrypto getIdHeader] 呼叫。
    /// checkcode = 裝置限時驗證碼。iOS 請使用 [CCPCrypto getCheckcode] 呼叫。
    /// ChatID = 聊天ID(對方帳號或ClientGID)

    public class read_msg : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            HttpRequest req = context.Request;
            HttpResponse resp = context.Response;
            resp.ContentType = "text/plain";
            resp.ContentEncoding = System.Text.Encoding.UTF8;
            DateTime reqTime = DateTime.Now;
            string resultStr = "";

            try
            {
                //【01】取得POST參數，驗證身分
                //
                string idHeader = req.Form["idHeader"];
                string checkcode = req.Form["checkcode"];
                string ChatID = req.Form["ChatID"];//聊天ID(對方帳號或ClientGID)
                string ReceiveID = req.Form["ReceiveID"];//Client DateTime/Server DateTime (2014/01/01 12:00:00)

                SipUserInfo userInfo = SipKit.GetUserInfo(idHeader, checkcode, req);
                if (userInfo == null)
                {
                    throw new Exception("Error_01: Cannot identify this device");//無法識別此裝置
                }

                //【02】讀取對話的未讀訊息
                //
                Dictionary<string, object> resultDict = null;
                if (ReceiveID != null &&
                    ReceiveID.Length > 12)
                {
                    DateTime dateTime;
                    if (DateTime.TryParse(ReceiveID, out dateTime))
                    {
                        if (SipKit.isGroupID(ChatID))
                        {
                            resultDict = OracleKitMsg.ReadGroupMsgs_ByID(userInfo, ChatID, ReceiveID);
                        }
                        else
                        {
                            resultDict = OracleKitMsg.ReadOneOneMsgs_ByID(userInfo, ChatID, ReceiveID);
                        }
                    }
                }
                else
                {
                    if (SipKit.isGroupID(ChatID))
                    {
                        resultDict = OracleKitMsg.ReadGroupMsgs(userInfo, ChatID);
                    }
                    else
                    {
                        resultDict = OracleKitMsg.ReadOneOneMsgs(userInfo, ChatID);
                    }
                }

                //【99】回傳結果
                //
                resp.ContentType = "application/json";
                resp.Charset = null;
                fastJSON.JSON.Instance.Parameters.EnableAnonymousTypes = true;
                resultStr = fastJSON.JSON.Instance.ToJSON(resultDict);
            }
            catch (Exception ex)
            {
                resp.ContentType = "application/xml";
                resultStr = ChrisKit.Ex2Xml(ex, false);
            }
            finally
            {
                int contentLength = resp.ContentEncoding.GetByteCount(resultStr);
                resp.AppendHeader("Content-Length", contentLength.ToString());
                resp.Write(resultStr);
                resp.Flush();
                resp.Close();
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }

    }
}
